Abdominal trainer



FIG. 1 is a rear perspective view of an abdominal trainer, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a bottom perspective view thereof; and,

FIG. 9 is its use state diagram.

The broken lines in the drawings illustrate the portions of the abdominal trainer, which form no part of the claimed design. 

CLAIM The ornamental design for an abdominal trainer, as shown and described. 